1961963333 has 6 divisors (see below), whose sum is σ = 2156538342. Its totient is φ = 1783602920.

The previous prime is 1961963329. The next prime is 1961963359. The reversal of 1961963333 is 3333691691.

It can be written as a sum of positive squares in only one way, i.e., 1429369249 + 532594084 = 37807^2 + 23078^2 .

It is not a de Polignac number, because 1961963333 - 2² = 1961963329 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961963363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8107166 + ... + 8107407.

It is an arithmetic number, because the mean of its divisors is an integer number (359423057).

Almost surely, 2^1961963333 is an apocalyptic number.

It is an amenable number.

1961963333 is a deficient number, since it is larger than the sum of its proper divisors (194575009).

1961963333 is a wasteful number, since it uses less digits than its factorization.

1961963333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16214595 (or 16214584 counting only the distinct ones).

The product of its digits is 236196, while the sum is 44.

The square root of 1961963333 is about 44294.0552783328. The cubic root of 1961963333 is about 1251.8826740472.

The spelling of 1961963333 in words is "one billion, nine hundred sixty-one million, nine hundred sixty-three thousand, three hundred thirty-three".